| details |
Ordovician |
|
Nd |
Eisenack,A. Hystricosphaeres |
1963 |
| details |
Ordovician |
Silurian |
Bulgaria |
Sergeeva,L.A. et al. Micropaleophytological investigations of metamorphic formations of the Carpathian Balkan folded region. (In: Stratigraphy and Correlation of Sediments Using Palynology Methods. Materials IV All-Union Palynological Conference. G.N.Papulov, editor) |
1983 |
| details |
Ordovician |
Silurian |
Nd |
Rudavskaya,V.A. Hystrichosphaerida of the Paleozoic Era |
1965 |
| details |
Ordovician |
|
Nd |
Evitt,W.R. Observations on the morphology of fossil dinoflagellates. |
1961 |
| details |
Ordovician |
Silurian |
Baltic |
Timofeev,B.V. Phytoplankton and dispersed spores of the Ordovician, Silurian and Lower Devonian of the Baltic Region, the Gory Switokrzyskie and Podolia. |
1963 |
| details |
Ordovician |
Silurian |
Poland |
Timofeev,B.V. Phytoplankton and dispersed spores of the Ordovician, Silurian and Lower Devonian of the Baltic Region, the Gory Switokrzyskie and Podolia. |
1963 |
| details |
Ordovician |
|
Nd |
Downie,C. Observations on the nature of the acritarchs |
1973 |
| details |
Ordovician |
|
Nd |
Servais,T. An annotated bibliographical review of Ordovician acritarchs |
1997 |
| details |
Nd |
|
France |
Alpern,B. et al. Palaeobotany and palynology in France: a historical review. |
1968 |
| details |
Nd |
|
Nd |
Evitt,W.R. A discussion and proposals concerning fossil dinoflagellates, Hystrichospheres, and acritarchs. II. |
1963 |
| details |
Nd |
|
Nd |
Brito,I.M. The acritarchs |
1967 |
| details |
Nd |
|
Nd |
Sarjeant,W.A.S. The Hystrichospheres. A review and discussion. |
1961 |
| details |
Nd |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Nd |
|
Nd |
Eisenack,A. Contribution to acritarch research. |
1974 |
| details |
Middle Ordovician |
Late Ordovician |
Ohio |
Jacobson,S.R. Acritarchs as paleoenvironmental indicators in Middle and Upper Ordovician rocks from Kentucky, Ohio and New York. |
1979 |
| details |
Middle Ordovician |
Late Ordovician |
New York |
Jacobson,S.R. Acritarchs as paleoenvironmental indicators in Middle and Upper Ordovician rocks from Kentucky, Ohio and New York. |
1979 |
| details |
Middle Ordovician |
Late Ordovician |
Ohio |
Jacobson,S.R. Biostratigraphy and paleoecology of acritarchs from Middle and Upper Ordovician rocks in the Cincinnati Region. |
1977 |